Copper AE=1.29x10-15J Characteristic λ=0.139mm AE=0.15×10-15J Continuous radiation A213x where K- Is2 level Low-energy L-2s p level M-2s'pod"level Wavelength 1132 LUMINESCENCE(发光) Fluorescence萤光) reemission occurs for times much less than one second Stimulus 再发射时间短于秒 nd价带 Phosphorescence(磷光) E A very long for longer times 再发射时间较长 萤光材料 磷光材料 Stimulus Stimulus Valence band价带 alence band价带7 Kα λ = 0.154nm ∆E = 1.29 × 10-15J Kβ λ = 0.139nm ∆E = 0.15 ×10-15J Lα λ = 1.336nm ∆E = 1.43 ×10-15J where K = 1s2 level L = 2s2p6 level M = 2s2p6d10 level Copper Characteristic peaks Continuous radiation High-energy stimulus Lα Kβ Kα λswl Intensity of emitted radiation Low-energy stimulus Energy Wavelength Fluorescence(萤光) reemission occurs for times much less than one second Phosphorescence(磷光) for longer times 11.3.2 LUMINESCENCE (发光) 再发射时间较长 再发射时间短于1秒 Photon Stimulus Valence band No Eg λ very long e－ e－ 金属 激励 光子 价带 fixed E hc g λ = = 萤光材料 Stimulus Photon Conduction band Valence band e－ e－ Eg 激励 光子 价带 Trap Ed Eg fixed E E hc g d = − λ = Stimulus Conduction band Valence band e－ e－ e－ 磷光材料 τ t I I =        0 ln 激励 光子 价带